Boat



BOAT

Filed May 19, 1944 5 Sheets-Sheet a I 'OCt. 9, 1945. 3, HARVEY 2,386,215

i '4 i 1 M E In 1W1 for bawZdBf/zrvg EMZ W Patented Oct. 9, 1945 UNITEDSTATES PATENT OFFICE BOAT Harold B. Harvey, Pensacola, Fla.

Application May 19-, 1944, Serial No. 536,362

1 Claim. (01. 115 -19) I The present invention relates to new and usefulimprovements in boats, and has for its primary object to provide avehicle f this character comprising propelling means of a uniqueconstruction and arrangement.

Another very important object of the invention is to provide a boat ofthe character described comprising a hull of novel shape whereby waterand wind resistance will be reduced to a minimum.

Other objects of the invention are to provide a boat of the characterset forth which will be comparatively simple in construction, strong,durable, seaworthy, attractive in appearance and which may bemanufactured at low cost.

All of the foregoing and still further objects and advantages of theinvention will become apparent from a study of the followingspecification, taken in connection with the accompanying drawingswherein like characters of reference designate corresponding partsthroughout the several views, and wherein:

Figure 1 is a top plan view of a boat constructed in accordance with thepresent invention.

Figure 2 is a view in side elevation thereof with the rear end portionof the propeller broken away.

Figure 3 is a view in bottom plan of the boat.

Figure 4 is a view in longitudinal section through the propelling means,taken substantially on theline 4-4 of Figure 1.

Figure 5 is a view in transverse section, taken substantially on theline 5-5 of Figure 1.

Figure 6 is a view in transverse section, taken substantially on theline 6-6 of Figure 4.

Figure 7 is an enlarged fragmentary view in transverse section, takensubstantially on the line 1-1 of Figure 4.

Referring now to the drawings in detail, it will be seen that theembodiment of the invention which has been illustrated comprises a, hullof suitable dimensions and material which is designated generally byreference character I. The hull l includes a bottom 2 of substantiallythe shape shown to advantage in Figures 3 and 5 of the drawings.

Extending longitudinally into the hull I from the stern thereof is arecess 3. Thus, the stern portion of the hull l is divided into what maybe considered a pair of spaced, parallel stabilizer 4. The bottoms ofthe stabilizers 4 are stepped, as at 5.

A cabin 6 is provided in the hull l forwardly of the recess 3. The cabin6 rises above the deck I of the hull Fixed on the transom 8 whichextends between the stabilizers 4 at the rear of the cabin 6 is asubstantially bullet-shaped, stationary inner shell 9. A suitable engineIt! is mounted in the shell 9. Mounted centrally in the shell 9 is alongitudinal propeller shaft ll.

The rear end portion of the shaft ll extends through a suitable bearing12 which is provided therefor on the rear end portion or nose I3 of theshell 8. In the embodiment shown, the forward end portion of the shaftII is journaled in a bearing I4 on the engine It. The engine Ill drivesthe shaft ll through a belt and pulley connection [5.

Mounted on the shell 9 is a propeller which is designated generally byreference character IS. The propeller 16 includes a substantiallybulletshaped, rotary outer shell I! which encloses the stationary innershell 9 in spaced relation thereto. Suitable bearings I 8 are providedfor the outer shell ll. Fixed on the outer shell I! and extendingsubstantially from end to end thereof is a'spiral fin or blade l9.

A drive connection 20 is providedbetween the shaft H and the propellerIt. This connectionincludes an internally toothed ring 2| which is fixedin the nose portion 22 of the shell ll. Fixed on the rear end portion ofthe shaft l I is a gear 23 which is meshed with the teeth of the ring2|.

It is thought that the operation of the boat will be readily apparentfrom a consideration of the foregoing. Briefly, the power plant If)rotates the propeller I6 on the stationary inner shell 9 through thebelt and pulley drive ii, the haft l l and the connection 20. Thus, thesubstantially spiral fin or blade I9 is caused to turn in the water andsimply function substantially in the manner of an auger for propellingthe boat. A. continuous bite is had in the Water from end to end of thefin or blade l9. The engine l0 may be controlled from the cabin 6 in anydesired manner. Also, any suitable means may be provided for steeringthe boat.

It is believed that the many advantages of a boat constructed inaccordance With the present invention will be readily understood, andalthough a preferred embodiment of the boat is as 40 illustrated anddescribed, it is to be understood that changes in the details ofconstruction and in the combination and arrangement of parts mayberesorted to which will fall within the scope of the invention asclaimed.

What is claimed is:

A boat comprising a hull having a recess extending longitudinallythereinto from the rear end thereof and providing a pair of spaced,parallel, rearwardly extending stabilizers, a cabin in the hullforwardly of the recess, a transom extending between the stabilizers andconstituting the rear wall of the cabin, an elongated, stationary innershell fixed on the transom and communicating with the cabin, said innershell extending rearwardly in the recess between the stabilizers, apower plant in the inner shell, an outer shell rotatable on the innershell, a, spiral blade on said outer shell, and meansoperativelyconnecting the power plant to the outer shell for propelling the boat.

HAROLD B. HARVEY,

